A numerical model for the prediction of the fluid dynamic and mechanical losses of a Wankel-type expansion device

Francesconi, Marco; Antonelli, Marco

doi:10.1016/j.apenergy.2017.07.125

Cited by 16 publications

(3 citation statements)

References 41 publications

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“…Like piston engine, Wankel's principle can be applied to the other systems. For instance, Wankel engine can be used to expander in the Rankine cycle [4] . Similarly to Wankel engine and Wankel expander, the Wankel pump has bigger output density and higher specific power, and prevents the unstable of inertia moment and inertial force caused by the reciprocating piston, which easily causes imbalance vibration and noise.…”

Section: Wankel Prototypementioning

confidence: 99%

Experiment-Based Wankel Pump Efficiency Analysis

Zhang,

Li*,

Hao

et al. 2020

Preprint

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Section: Wankel Prototypementioning

confidence: 99%

Experiment-Based Wankel Pump Efficiency Analysis

Zhang,

Li*,

Hao

et al. 2020

Preprint

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“…3, the rotation angle of B is β, and the angle at which vertex M rotates is φ. Two equal-length arcs appear during variation of the inscribed point of the fixed-and annular-gear indexing circles: α• R = β• r, α/β = r/R = 2/3 can be obtained, because β = α + φ, β = 3φ (Francesconi and Antonelli, 2016). The coordinates of any vertex M in the X-Y coordinate system, i.e., the cylinder line, can be expressed as…”

Section: Fig 3 Trp Mathematical Modelmentioning

confidence: 99%

Performance evaluation and flow analysis of two-cylinder triangular rotor pump based on experiment and numerical simulation

Xiao

et al. 2019

JAMDSM

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To solve the problems of small flow and low efficiency for a reciprocating piston pump, a new type of rotary piston pump, triangular rotor pump (TRP), is proposed. Its mechanical structure and working principles are introduced and a mathematical model of the key pump structure and the design requirements for the key sealed components are presented. Experiments involving different outlet sizes and shaft speeds are performed on the AB-1.25D-type TRP. Through Fluent numerical calculation, the fluid flow line, velocity vector, and pressure distribution inside the TRP are analyzed. The results show that, for outlet size a (b) and 190(160)-r/min speed, the pump flow rate reaches a maximum of 8.83 (7.34) m 3 /h, the shaft power is 5.2 (5.1) kW, and the total efficiency exceeds 72%(65.7%). The numerical calculation results show that four vortices appear in the working-chamber (W-C) for different working processes and areas. The W-C pressure first increases and then decreases, and the maximum pressure occurs at the beginning of the stable full-pressure state. The experimental results for the pressure coefficient, flow coefficient, and total efficiency agree well with the numerical results. The TRP exhibits good performance and can be used in deep mine drainage, long-distance pipeline transportation, and grouting.

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“…In their latest study, they found that the optimization of the timing and shape of the intake and exhaust port can improve the work efficiency of compressed air . In addition, they also found that reducing friction caused by sealing and bearing can improve the expander efficiency . Sadiq et al investigated the performance of the air‐powered rotary engine.…”

Section: Introductionmentioning

confidence: 99%

Effects of intake and exhaust valve timing on the performance of an air‐powered rotary engine

Pan

Chen

Yang

et al. 2017

Env Prog and Sustain Energy

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This work is aimed at improving the performance of the air‐powered rotary engine. A dynamic simulation model which includes an eccentric motion and rotary valve movement was established by our particle image velocimetry (PIV) experimental data. Then the power and specific steam consumption (SSC) was evaluated. The pressure distribution in the chamber was obtained which was difficult to obtain through experiment. Simulation results showed that for the work process and pressure distribution, the intake valve timing mainly affected the intake expansion stage (A2) and pure expansion stage (B). Due to this, a relatively low pressure was distributed in the middle of the chamber and this was beneficial to the intake and work processes. The exhaust valve timing mainly affected the exhaust stage (C) and initial intake stage (A1). Therefore, a relatively high pressure which was distributed in the middle‐rear of the chamber was beneficial to the exhaust processes. For the power and SSC, the power increased initially then decreased and the SSC decreased with the increase of intake advance angle respectively. Both the power and the SSC increased with the increase of intake duration angle. The power increased while the SSC decreased with the increase of exhaust advance angle. The power increased and the SSC decreased initially then increased with the increase of exhaust duration angle. The preferred parameters were found to be 30° CA, 240° CA, 30° CA, and 280° CA. These improved parameters had a 2.7% increase in the power and also a 2.4% decrease in the SSC. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1462–1474, 2018

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A numerical model for the prediction of the fluid dynamic and mechanical losses of a Wankel-type expansion device

Cited by 16 publications

References 41 publications

Experiment-Based Wankel Pump Efficiency Analysis

Experiment-Based Wankel Pump Efficiency Analysis

Performance evaluation and flow analysis of two-cylinder triangular rotor pump based on experiment and numerical simulation

Effects of intake and exhaust valve timing on the performance of an air‐powered rotary engine

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